M - 17 Omega or Swan Nebula
M-17 The Omega or Swan Nebula. Probably my personal favorite example of nebulosity, M-17 is seen as a curving check mark relatively bright nebulosity, with many dark mottlings seen, especially along its straighter portion. As with most astronomical objects, the longer this nebula is studied, the more detail becomes apparent. A UHC filter is helpful, but definitely not necessary with this celestial gem.